Geophysical Surveys

To schedule a geophysical surveying job with Subtronic Corporation, please contact us.

We use Geophysical surveys to determine various physical properties of the Earth, and in our line of work, the immediate subsurface. Geophysical methods are non-invasive and non-destructive. The geophysical disciplines that Subtronic specializes in are:

  • Resistivity
  • Ground Penetrating Radar
  • Seismic
  • Magnetics
  • Gravity

In addition to these specialisms:

  • Geophysical methods above can be used independently in response to a clients’ needs, or multiple ways can be used in tandem to increase the integrity of the data collected
  • We use Geophysical techniques to corroborate observations from other investigative methods such as borehole testing, groundwater sampling, etc
  • We also use Geophysical surveys to plan or guide geotechnical work, including placement of wells, subsurface hazard avoidance, structural applications, and boreholes


Geophysical surveys can:

  • Determine rock and soil characteristics
  • Map soil, rock, and groundwater structures
  • Investigate geological hazards such as faults and landslides
  • Map landfill and hazardous waste boundaries
  • Locate underground storage tanks, utilities, and former excavations

Frequently Asked Questions

1) How does Subtronic plan a geophysical survey?

  1. Subtronic begins planning for our geophysical surveys by first communicating with our clients, determining the specific objective they would like investigated. Subtronic then compiles information on the local geology, regional geology, and site conditions, using this information as well as previous experience to develop a plan which will address the client’s objectives safely and accurately.

2) How long do geophysical surveys take?

  1. Depending on the client’s objective, the size of the site, the geophysical methods required, and the amount of data analysis needed in the office, a geophysical survey can take anywhere from a day to weeks to complete. A typical local geophysical survey takes two to three days to complete.

3) How much do geophysical surveys cost?

  1. The travel time required to a site from our Martinez, California office, the amount of staff needed, the necessary geophysical equipment, and the complexity of the job all determine the final cost of a geophysical survey. Depending on the scope of the work required, a geophysical survey can range in cost from under $1000 to $50,000+. A typical local geophysical survey based on two to three days required can vary in price from $2000 to $7000.

Send an inquiry to our geophysical department to see if we can address your geotechnical needs!